Ok so far as I understand the schedule.
Friday people are arriving.
Saturday day is the GIGANTIC meet-up
Sunday night is cocktail party.
So the only open slot is Sunday lunch. Thinking 11 or 12. That should be enough to time to change and get to the cocktail party.
I promised MsMary I would take her to enjoy Puget Sound's finest oysters if she ever visited Seattle.
http://www.elliottsoysterhouse.com/
I'm opening this up for anyone to come. I will have to make a reservation.